package com.sky.controller.user;

import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishOverViewVO;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "菜品浏览接口")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId){
        log.info("分类id：{}",categoryId);
        //构造redis的key，构造规则：dish_分类的id
        String key = "dish_" + categoryId;

        //查询redis中是否存在菜品数据
        List<DishVO> dishes = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if(dishes != null && !dishes.isEmpty()){
            //如果存在，直接返回，无需查询数据库
            return Result.success(dishes);
        }

        //如果不存在，查询数据库，将查询的数据放入redis中
        dishes = dishService.getWithFlavorByCategoryId(categoryId);
        redisTemplate.opsForValue().set(key,dishes);

        return Result.success(dishes);
    }
}
